Parts for your 2009 Toyota Fortuner-Transmission fluid

2009 Toyota Fortuner transmission fluid — what it does and when to change it

Per Toyota service literature for the AN60-series Fortuner and the Aisin A340/A343 automatic transmissions used in this era, the 2009 Fortuner fitted with an automatic gearbox uses automatic transmission fluid (ATF). Toyota documentation notes Type T‑IV (JWS 3309) for many 4‑speed A340/A343 units of the time, while some later 5‑speed applications specify Toyota ATF WS. The owner’s manual and the transmission dipstick or filler/overflow plug label are the definitive references. Manual-transmission Fortuner variants use dedicated manual gearbox oil rather than ATF.

For an automatic 2009 Fortuner, transmission fluid is doing a lot more than just lubrication. It provides the hydraulic pressure that applies clutches and bands, transmits torque through the converter, cools internal components, reduces wear, and keeps varnish and sludge in check. The right friction characteristics are essential for smooth, positive shifts and long clutch life, which is why Toyota’s ATF specs (T‑IV or WS, depending on the box) matter — mixing fluids can cause shudder or delayed engagement.

Plenty of Toyota autos from this period are labelled “sealed” or “no scheduled service,” but that’s under ideal conditions. In Aussie and Kiwi use — towing the boat, touring in high heat, or crawling off-road — fluid works harder. A sensible service approach is a drain-and-fill every 60,000–80,000 km or 4–5 years for mixed or severe duty, and up to 100,000 km for light highway use. A single drain typically replaces about 3–4 litres, the total system capacity can be around 8–10 litres, so repeating drain-and-fills or doing a professional exchange gets more of the old fluid out. Always use the exact Toyota-specified ATF for the transmission fitted.

Good workshops will drop the pan (if fitted), clean it, replace the strainer/filter and gasket, and set the fluid level at the correct temperature via the overflow/tube method or scan-tool temp check. Signs it’s time include dark or burnt-smelling fluid, shift flare, harsh engagement, or weeping at cooler lines. As part of routine servicing, a quick inspection for leaks, a colour/odour check, and confirming level at the specified temp can save the transmission from costly grief later on.

• Use only Toyota-specified ATF (T‑IV or WS as applicable)
• Favour shorter intervals for towing, heat, sand, or stop–start
• Set level hot and correct — this isn’t a guesswork job

Popular questions

What transmission fluid does a 2009 Fortuner automatic use?
Most 4‑speed A340/A343 autos of this era specify Toyota ATF Type T‑IV (JWS 3309). Some later 5‑speed units use Toyota ATF WS. Check the owner’s manual, the transmission identification, or the dipstick/overflow plug label to confirm the exact spec for the vehicle’s VIN.

How often should the ATF be changed in Australia or New Zealand?
For towing, off‑road, mountain or hot-climate use, aim for 60,000–80,000 km or 4–5 years. For lighter highway duty, up to 100,000 km can be reasonable. Despite “sealed” messaging, fluid condition and operating environment should guide the interval.

How much fluid will it take, and can it be done at home?
A drain-and-fill typically replaces about 3–4 litres, total capacity is often 8–10 litres. DIY is possible for experienced hands, but setting the level at the correct temperature via the overflow/tube method and using the right ATF is critical — many owners prefer a workshop with the proper equipment.